<template>
  <el-container class="home-container">
      <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/heima.png" alt="">
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单区域 -->
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409EFF"
          :unique-opened="true"
          :collapse="isCollapse"
          :collapse-transition="false"
          router
          :default-active="activePath">
          <!-- 一级菜单 -->
          <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
            <!-- 一级菜单的模板区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconsObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>

              <!-- 二级菜单 -->
              <el-menu-item 
                :index="'/'+ subItem.path" 
                v-for="subItem in item.children" 
                :key="subItem.id"
                @click="saveNavState('/'+ subItem.path)">
                <template slot="title">
                  <!-- 图标 -->
                  <i class="el-icon-menu"></i>
                  <!-- 文本 -->
                  <span>{{subItem.authName}}</span>
                </template>
              </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧内容主题 -->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
import {getMenuList} from '@/api'
export default {
    name:'Home',
    data() {
      return {
        menulist:[],
        iconsObj:{
          '125':'iconfont icon-user',
          '103':'iconfont icon-tijikongjian',
          '101':'iconfont icon-shangpin',
          '102':'iconfont icon-danju',
          '145':'iconfont icon-baobiao'
        },
        isCollapse:false,
        // 被激活的链接地址
        activePath:''
      }
    },
    created() {
      this.getMenuList()
      this.activePath = window.sessionStorage.getItem('activePath')
    },
    methods:{
      // 点击按钮退出
      logout(){
        window.sessionStorage.clear();
        this.$router.push('/login')
      },
      // 点击按钮切换菜单的折叠与展开
      toggleCollapse(){
        this.isCollapse = !this.isCollapse
      },
      // 保存链接的激活状态
      saveNavState(activePath){
        window.sessionStorage.setItem('activePath',activePath)
        this.activePath = window.sessionStorage.getItem('activePath')
      },
      getMenuList(){
          getMenuList().then(({data:res}) => {
          if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
          this.menulist = res.data
          console.log(res);
        })
      }
    },
    mounted() {

    },
}
</script>

<style lang="less" scoped>
.home-container{
  height: 100vh;
}
  .el-header{
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
    div{
      display: flex;
      justify-content: space-between;
      align-items: center;
      span{
        margin-left: 15px;
      }
    }
  }
  .el-aside{
    background-color: #333744;
    .el-menu{
      border-right: none;
    }
    .toggle-button{
      background-color: #4A5064;
      color: #fff;
      font-size: 10px;
      line-height: 24px;
      text-align: center;
      letter-spacing: 0.2em;
      cursor: pointer;
    }
  }
  .el-main {
    background-color: #eaedf1;
  }
  .iconfont {
    margin-right: 10px;
  }
</style>